[PATCH 2/7] KVM: arm: guest debug, define API headers
From: Alex Bennée <hidden>
Date: 2014-11-25 16:36:03
Also in:
kvm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
This commit defines the API headers for guest debugging. There are two architecture specific debug structures: - kvm_guest_debug_arch, allows us to pass in HW debug registers - kvm_debug_exit_arch, signals the exact debug exit and address The type of debugging being used is control by the architecture specific control bits of the kvm_guest_debug->control flags in the ioctl structure. Signed-off-by: Alex Benn?e <redacted>
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index 8e38878..de2450c 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h@@ -93,10 +93,30 @@ struct kvm_sregs { struct kvm_fpu { }; +/* See ARM ARM D7.3: Debug Registers + * + * The control registers are stored as 64bit values as the setup code + * is shared with the normal cpu context restore code in hyp.S which + * is 64 bit only. + */ +#define KVM_ARM_NDBG_REGS 16 struct kvm_guest_debug_arch { + __u64 dbg_bcr[KVM_ARM_NDBG_REGS]; + __u64 dbg_bvr[KVM_ARM_NDBG_REGS]; + __u64 dbg_wcr[KVM_ARM_NDBG_REGS]; + __u64 dbg_wvr[KVM_ARM_NDBG_REGS]; }; +/* Exit types which define why we did a debug exit */ +#define KVM_DEBUG_EXIT_ERROR 0x0 +#define KVM_DEBUG_EXIT_SINGLE_STEP 0x1 +#define KVM_DEBUG_EXIT_SW_BKPT 0x2 +#define KVM_DEBUG_EXIT_HW_BKPT 0x3 +#define KVM_DEBUG_EXIT_HW_WTPT 0x4 + struct kvm_debug_exit_arch { + __u64 address; + __u32 exit_type; }; struct kvm_sync_regs {
@@ -198,4 +218,12 @@ struct kvm_arch_memory_slot { #endif +/* Architecture related debug defines - upper 16 bits of + * kvm_guest_debug->control + */ +#define KVM_GUESTDBG_USE_SW_BP_SHIFT 16 +#define KVM_GUESTDBG_USE_SW_BP (1 << KVM_GUESTDBG_USE_SW_BP_SHIFT) +#define KVM_GUESTDBG_USE_HW_BP_SHIFT 17 +#define KVM_GUESTDBG_USE_HW_BP (1 << KVM_GUESTDBG_USE_HW_BP_SHIFT) + #endif /* __ARM_KVM_H__ */
--
2.1.3